I'm not sure Jimmy.
I know when we went in January we tried to get into a studio around 10:30. They wouldn't let us in, and were pretty adamant about us not coming back before check in, but they told us which buildings had studios available. We chose which one we wanted and they gave us a card with a phone number for OKW front desk on it and our room keys and we headed off to Blizzard Beach.
As we were leaving BB around 4:00 we stopped at Guest Services and they called to OKW for us. They gave us the room number and we drove right to the room when we got over to OKW.
Hopefully they will let you in, but I'd have a plan on something to do with the family just in case.